Building corner form structure

ABSTRACT

A reusable building form structure defined by opposed, rigid, preformed, self-supporting form members, and a method of utilizing the same with previously erected building wall panels, to produce a corner column defined by settable construction material introduced into the space delimited by the wall panels and the corner form structure. Improved alignment means are provided on adjacent form members to insure proper interengagement of abutting form members vertically arranged endto-end to permit formation of corner columns of varying heights.

United States Patent Keyston 154] BUILDING CORNER FORM STRUCTURE [72]Inventor: David H. Keyston, Burlingame, Calif.

[73] Assignee: Anza Pacific Corporation, Burlingame,

Calif.

[22] Filed: Mar. 14, 1969 [21] Appl.No.: 807,337

[52 user. ..249/l9,249/l94,25/l31CF s11 lnt.Cl ..E04gll/00 5sFieldoiSearch ..249/l8,l9,l92,194,l89,249/l95,2l0,2ll,26,27,28,29,30,3l,32,48,I88,189,l92,85,90,191,168,219R,219W,47;

[56] References Cited UNITED STATES PATENTS 1,752,552 4/1930 Estes..164/385 2,475,890 7/1949 Hamilton" ....25/13l P 2,548,935 4/1951Billner ...249/27 X 3,182,948 5/1965 Lawrence ..249/192 X [451 Apr. 4,1972 910,883 1/1909 Turkington ..249/ 192 X 2,739,362 3/1956 Young...249/166 X 2,788,560 4/1957 De Boisblanc.... .....249/27 X 2,951,5209/1960 La Bar ..249/19 3,279,738 10/1966 Meyers... ..249/25 3,371,9043/1968 Low ...249/219 X 3,447,771 6/1969 Trimmer ..249/192 PrimaryExaminer-J. Spencer Overholser Assistant Examiner-John S. BrownAttorney-Flehr, Hohbach, Test, Albritton 8/. Herbert [S 7] ABSTRACT Areusable building form structure defined by opposed, rigid, preformed,self-supporting form members, and a method of utilizing the same withpreviously erected building wall panels, to produce a corner columndefined by settable construction material introduced into the spacedelimited by the wall panels and the corner form structure. Improvedalignment means are provided on adjacent form members to insure properinterengagement of abutting form members vertically arranged end-to-endto permit formation of corner columns of varying heights.

13 Claims, 7 Drawing Figures BUILDING CORNER FORM STRUCTURE CROSSREFERENCE TO CO-PENDING APPLICATION The present application presents aform structure and building construction method which includesmodifications to and certain improvements over the disclosure of pendingKeyston application Ser. No. 662,265, filed Aug. 8, 1967, entitledBuilding Form Structure now U.S. Pat. No. 3,547,395, dated Dec. 15,1970.

BACKGROUND OF THE INVENTION 1. Field of the Invention I This inventionrelates generally to the construction field, and is specificallydirected to an improved construction structure and procedure for fillingin the space between two angularly oriented spaced building wall panelswhich have been positioned to provide a corner portion of a wall of abuilding being erected. The gap between adjacent opposing edge surfacesof the angularly oriented building wall panels is filled in with asettable construction material, such as concrete, to provide a cornercolumn of the building wall.

This invention is particularly directed to a reusable building formstructure, and its method of use, employed in defining the inner andouter limits of the space between angularly oriented building wallpanels into which the settable construction material is to be inserted.The present form structure is comprised of cooperable form membercomponents which are rigid and self-supporting so that they may berepeatedly used in the construction of numerous building walls, or otherrelated and analogous wall structures.

The form structure disclosed herein has particular utility inconjunction with the erection of tilt-up wall buildings in whichconcrete or like wall panels are formed in horizontal position on theground and are thereafter tilted into operative position in the verticalorientation with adjacent wall panels cooperating to define the cornerof a building when the space therebetween is filled in by a cornercolumn defined by settable construction material introduced into suchspace. The present form structure has utility, however, in erecting anybuilding wall or like construction in which it is desired or required tofill in a gap between adjacent opposed edge surfaces of spaced wall orlike panels.

This invention further relates to the field of building form structureswhich are alignable with similar form structures, so that corner columnsof varying heights may be produced in accordance with the heights of thebuilding wall panels in conjunction with which such form structures areused. To that end, form members of varying lengths are provided topermit incremental build-up of a single operable form structure asrequired to meet a particular building need.

Description of the Prior Art It has been generally known in theconstruction art heretofore to utilize building forms to place definitelimits on the space which exists between opposed edge surfaces ofbuilding wall panels erected by the tilt-up technique. Heretofore,multi-piece wooden form structures were employed for that purpose whichhad to be tailored to meet the requirements of a particular constructionproject. Such wooden form structures were not repeatedly reusable in theconstruction of nu merous building walls because the same weresubstantially damaged during separation from the wall panels engagedthereby during use. To adapt such wooden form structures for reuserequired substantial repair thereof which generally made any attemptedreuse uneconomical.

With prior known form structures, it was customary to unite the woodencomponents thereof together at the site of the construction job. Aftersuch components had served their intended function, such components werelargely destroyed or appreciably damaged during removal thereof from theresulting building wall comer. This common prior art practice wasextremely expensive because of the skilled labor required to removal.Such prior known form structures required many components, includingnumerous wooden parts and various types of connectors to retain thewooden parts securely together during use thereof.

The pending application above identified presents a reusable formstructure which rectifies many of the shortcomings of prior woodenforms. However, the form structure of the pending application isdesigned primarily for use with aligned wall panels, rather thanangularly oriented wall panels which define a building corner.

With the improved self-supporting form structure of the presentinvention, a minimum number of components are required, both in definingthe comer form structure and in maintaining the components of the formstructure together during use thereof. Furthermore, corner columns ofvarying heights may be readily formed merely by joining together inend-to-end relationship form members of the present invention to thedesired height. In that regard, alignment means are provided integralwith respective form members to facilitate such end-to-endinterconnection.

The forms of the structure of this invention, in addition to thespecific advantages characteristic of their specialized construction,also possess the advantages set out in the aforementioned pendingapplication.

SUMMARY OF THE INVENTION The present invention relates to a sturdyreusable form structure for use in constructing a corner of a building.Such form structure is defined by opposed, elongated, preformed, rigidand self-supporting form members which are to be cooperably positionedin engagement with inner and outer surfaces of two spaced angularlyoriented building wall panels to bridge the gap therebetween so that asettable construction material, such as concrete, may be introduced tofill up such space and form a comer column therein.

The invention also includes the provision of varied length form membersof similar configuration which are to be positioned in end-to-endabutting relationship so that a corner column of pre-selected height maybe constructed in a given building wall structure. The invention relatesto an improved building method utilizing such form structures.

Furthermore, the invention relates to improved means for properlyaligning form members in end-to-end abutting relationship so thatbuilding wall columns of varying heights may be produced.

The form structure of this invention requires only two major formcomponents to erect a corner column of minimum height, plus associatedmeans for maintaining such fonns in position during use. However,additional form members cooperable with the form members utilized toform a column of minimum height also are provided so that comer columnof selectively varying heights may be produced.

The form members of this invention are appropriately reinforced toprovide the strength required to permit their repeated reuse and towithstand the substantial pressures to which they are subjected when thespace defined therebetween is filled with heavy settable constructionmaterial.

From the foregoing, it should be understood that objects of thisinvention include; the provision of an improved building form structurewhich is to be employed to bridge the space between angularly orientedspaced building wall panels at the comer of a building underconstruction; the provision of such a form structure which is repeatedlyreusable without requiring repairs; the provision of a corner formstructure defined by members for facilitating end-to-end interengagementbetween form members of similar configuration to insure effectiveinterconnection therebetween; and the provision of an im proved buildingcorner construction method. These and other objects of this inventionwill become apparent from a study of the following disclosure in whichreference is directed to the attached drawings.

DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view illustratingone side of a form structure of this invention bridging the gap betweenangularly oriented building wall panels at the corner of a buildingunder construction.

FIG. 2 is a horizontal sectional view through the building corner underconstruction taken in the plane of line 2-2 of FIG. 1.

FIG. 3 is a vertical sectional view through the building corner underconstruction taken in the plane of line 33 of FIG. 2.

FIG. 4 is an exploded view of the alignment means provided forinterconnecting similarly contoured form members in endto-endengagement.

FIG. 5 is an elevational view of a portion of a modified form structurefor use in forming a building corner column.

FIG. 6 is a plan view of the form structure of FIG. 5 taken in the planeof line 6-6 ofFIG. 5.

FIG. 7 is a sectional view through a further embodiment of a previouslydisclosed building form structure illustrating the novel alignment meansof this invention provide in conjunction therewith.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the aforementioned pendingapplication Ser. No. 662,265, an improved and highly effective formstructure is disclosed which is designed primarily for use inconjunction with constructing a building column between two laterallyspaced building wall panels which are generally aligned in coplanarrelationship. The present invention is a modification of the conceptdisclosed in such application and relates specifically to the formationof a building column at a corner of a building between two angularlyoriented building wall panels. While in the embodiment disclosed hereinsuch building panels are arranged generally at right angles to eachother, it should be understood that the concept of this invention alsois utilizable in forming columns between angularly oriented panels whichare other than normal with respect to each other.

The present invention further discloses improvements over the formstructure and procedure disclosed in the aforementioned application inthat improved means for aligning and maintaining form members togetherin end-to-end abutting relationship are provided to insure a smoothsurface on the wall column being formed in the area of juncture betweenthe abutting form members.

As described hereinafter, a manner of utilization of the corner formstructure of this invention is described with particular reference tothe construction of a tilt-up wall building in which wall panels ofconcrete or other suitable construction material are formed on theground in horizontal orientation and are thereafter tilted upright tothe vertical orientation to define a corner portion therebetween.However, it should be understood that this invention also is usable inconjunction with other construction methods in which a space between twobuilding wall panels or similar panels is to be filled in by a settablematerial to provide a continuous wall or like structure defined byfill-in column between two adjacent panels. For purposes ofillustration, reference is directed hereinafter to utilization of theinvention in conjunction with the tilt-up wall construction technique.

As seen in FIGS. 1 and 2, two preformed building wall panels, designed land 2, are positioned to extend upwardly from supporting base 3 in knownfashion. The base and the wall panels may be formed from any suitableconstruction material, of which concrete is typical. The wall panels arespaced from each other as erected and are angularly oriented relative toeach other so that extensions thereof would form a comer of the buildingbeing constructed.

Opposed edge surfaces 4 and 6 of the respective wall panels togetherdelimit one dimension of a vertically extending gap or space which is tobe filled by a settable construction material to provide a corner columnso that a continuous corner structure is produced which is capable ofsupporting the roof loads to be applied thereto. While the settablematerial is being introduced into the space between the wall panels, thepanels are maintained in proper vertical orientation angularly relatedto each other by suitable braces (not shown) in the manner well known inthe tilt-up building art.

In most construction situations, it is preferred to fill in the spacebetween the wall panels 1 and 2 to a degree greater than the respectivethicknesses of the wall panels so that an enlarged building column isproduced at the corner between the opposed edge surfaces of the wallpanels. Such a building column, designated 7 in FIG. 2, fills theaforementioned space between the building wall panels. As describedhereinafter, column 7 preferably is reinforced and keyed to the wallpanels to provide a strong integral corner wall structure.

To permit formation of the corner column 7 between the wall panelopposed edge surfaces, means are provided to delimit the other dimensionof the space between the wall panels into which the settableconstruction material is introducible and to retain the contour of suchsettable material while the same is hardening. Such means in thisinvention is defined by an improved comer building form structurecomprised of two principal reusable components for producing a comercolumn of predetermined height.

For a given column height, the principal components of the embodiment ofthe building form structure shown in FIGS. 1-3 are defined by twoelongated, preformed, rigid, and selfsupporting inner and outer integralchannel shaped form members, designated 8 and 9 respectively. Such formmembers, when positioned to receive settable construction materialtherebetween, are engaged with the respective inner and outer surfaces11 and 12 of the spaced wall panels as seen best in FIG. 2.

In the embodiment illustrated in FIGS. 1 through 3, the form structureis designed so that the corner wall column 7 is formed between the wallpanels 1 and 2 with the outer surfaces of the column being substantiallycoplanar with the outer surfaces 12 of the respective wall panels.However, as will be described hereinafter, alternative constructions andconfigurations may be imparted to the corner column by utilizing formmembers of contours different from the essentially V-shapedcross-sectional contour of the outer form of the embodiment seen in FIG.2.

It should further be understood that the inner form may be constructedso that a resulting comer column is defined by inner surfaces whichconverge and meet at an internal corner, such inner column surfacesbeing generally coplanar with the inner surfaces 11 of the building wallpanels 1 and 2 and meeting at a vertical inner edge which turns thelength of the column. Similarly, other modifications to the basicconcept specifically illustrated herein are contemplated so that columnsof varying contours or configurations are producible in accordance withthe particular contours of the form members employed.

Before specifically describing details of the preferred embodiments,reference is directed to FIG. 1 which illustrates utilization of thesubject form structure in interconnected increments so that a cornercolumn of a height greater than the height of a minimum length form maybe produced in accordance with the vertical height of the building wallpanels being joined by the comer column. In that regard, it has beenfound that utilization of four principal form lengths satisfy mostconstruction needs. To that end, forms in increments of 13 feet, 4 feet,2 feet, and 1 foot have been found to combine well to meet most commonconstruction requirements. However, for special projects, and to addfurther versatility to the construction system of this invention, formsin 18 foot lengths also may be utilized separately or in conjunctionwith other shorter forms.

By way of example, the subject structure shown in FIG. 1 comprises aform 24 feet high, for use in erecting high ceiling industrial typewarehouse buildings and the like, is illustrated which is produced fromfive form members designated 9, 13, 14, 16 and 17, positioned andinterconnected in end-to-end vertical abutting relationship. Alignmentmeans, for securely interconnecting the separate form members, aredescribed hereinafter.

It should also be understood that the inner corner form 8 similarly isdesigned for end-to-end interengagement with identically contoured innerforms in incremental lengths of the type just described.

Inner form 8 of the embodiment of FIGS. 2 and 3 comprises a base wall 21which is generally flat and has angular extensions 22 and 23 integraltherewith and angularly related thereto in accordance with the angularorientation between the building wall panels 1 and 2. In the embodimentshown in FIG. 2 such extensions 22 and 23 are generally normal to eachother because the wall panels 1 and 2 extend generally normal to eachother.

The base wall extensions 22 and 23 terminate in vertically extendingoutwardly directed flanges 24 and 26 which extend generally normal tothe respective planes of the base wall extensions. The base wallextensions are in secure surface-tosurface contact with the innersurfaces 11 of the building wall panels 1 and 2 and such extensions arespaced from each other by the base wall a distance sufficient to permitthe base wall to completely bridge the gap between the edges 4 and 6 ofthe building wall panels. When viewed in plan, the base wall extensionsdiverge outwardly relative to each other and to the plane of the basewall.

To provide seats for means for securing the inner and outer forms of theform structure together, as described hereinafter, an to reinforce andrigidify inner form 8, a series of vertically spaced aperturedreinforcing ribs 27 are formed integral with the base wall as seen inFIGS. 2 and 3. The ribs are defined by generally U-shaped channels eachof which is integrally secured to the base wall in suitable fashion,such as by welding. The spacing between adjacent ribs on the base wallof form 8 corresponds to the spacing of similar ribs provided on theform 9 as described hereinafter.

Outer form 9 is defined by two angularly oriented side walls 31 and 32which, in theembodiment illustrated in FIG. 2, extend generally at rightangles relative to each other and converge to meet at a verticallyextending edge 33.'That is, as seen from FIG. 2, when viewed in plan theside walls 31 and 32 of outer form 9 converge outwardly of the formstructure and meet at vertically extending edge 33 where they areintegrally joined with each other along such edge. The side walls 31 and32 are of sufficient lateral extent that generally coplanar extensionsthereof, designated 34 and 36 respectively, are engageable with theouter surfaces 12 of the building wall panels 1 and 2. Such wallextensions terminate in outwardly directed vertically extending flanges37 and 38 which project generally normal to the respective planes of theside wall extensions 34 and 36.

The respective side walls of form 9 are provided with vertically spacedapertured reinforcing ribs, designated 41 and 42 respectively, each ofwhich preferably is of U-shaped channel configuration corresponding tothe rib construction 27 of the inner form 8. Ribs 41 and 42 terminate ingenerally overlapping relationship outwardly of the vertical edge 33defined by walls 31 and 32. To provide a seat for the form securingmeans to be described, a generally U-shaped bracket 43 is positionedover and secured to each pair of ribs 41 and 42, as best seen in FIG. 2.

In the embodiment illustrated, the form securing means comprises boltand nut assemblies, defined by tapered bolts 44 each having a removablenut 46 on one end thereof and an enlarged head or another removable nut47 on the other end thereof as seen in FIG. 3. The respectiveenlargements on the tapered bolts are engaged with the outer surfaces ofthe respective brackets 43 of the outer form 9 and the respective ribs27 of the inner form 8 so that upon tightening of the nuts on thethreaded ends of the tapered bolts, the forms are drawn together intosecure engagement with the inner and outer surfaces of the building wallpanels.

Referring to FIG. 1, it will be noted that reinforcing ribs 41 and 42are vertically spaced from each other in a predetermined arrangement inwhich such ribs are more closely spaced adjacent the lower end of theform then adjacent its upper end. That is, in the embodimentillustrated, five such ribs are spaced from each other on approximately1' 5%" centers, while thereabove three such ribs are spaced from eachother on approximately 2 centers. Such spacing is provided so that boltand nut assemblies are more closely spaced adjacent the lower end of theform structure where the pressures of the settable construction materialto be introduced therebetween is the greatest.

With the shorter 4 foot forms 13 and 14 positioned end-toend withelongated form 9, two spaced ribs are provided, generally centrallythereof. With the shorter 2 foot and 1 foot forms 16 and 17 only onesuch reinforcing rib arrangement is required.

It will be understood, of course, that the inner forms utilize a ribspacing corresponding to that just described for the outer forms so thatthe tapered bolts 44 may be extended through aligned ribs in therespective forms.

When the inner and outer forms are positioned as seen in FIGS. 1 and 2,the space defined therebetween is ready to receive settable constructionmaterial therein. While various arrangements may be employed for fillingsuch space with settable construction material, concrete pumped throughconventional known nozzle and hose apparatus to provide column 7 may beemployed. The inner and outer forms, and any extensions utilizedtherewith in the manner seen in FIG. 1, are maintained in place untilthe corner column has completely hardened, following which therespective nut and bolt assemblies are removed and the forms areseparated from the column for cleaning and subsequent reuse as desired.Lower form 9 and any extensions to be connected therewith normally wouldbe interconnected on the ground and positioned in place as an integralunit. However, in separating the form structure from the corner column,it has been found frequently preferable to separate upper extension formcomponents from lower form components as individual units rather thenseparating the entire form structure as a unit from the completedcolumn.

As noted previously, referring to FIG. 2, it is preferred that thecorner column 7 is tied in with, or keyed to, wall panels 1 and 2. Suchkeying together is effected by a suitable reinforcing structure,generally designated 51, which is positioned in the space between thewall panels prior to placing the form structure in place to cooperatewith reinforcing means formed in the wall panels. Such reinforcingstructure includes a series of vertical reinforcing rods 52 positionedin a generally rectangular pattern which are coupled with a series ofspaced horizontal reinforcing rods 53, each of which is bent into agenerally rectangular configuration around the vertical rods 52. Aseries of such horizontal rods 53 are provided at vertically spacedlocations within the column in accordance with spacing of reinforcingmeans provided in the wall panels themselves.

In that regard, a series of vertically spaced horizontally extendingreinforcing rods 54 and 56 are positioned in the wall panels when theyare manufactured in known fashion. Projecting ends 57 and 58 of suchreinforcing rods project into the space between the wall panels and arebent therein to interfit with reinforcing structure 51. Thus, whencolumn 7 is poured in place, the reinforcing structure 51 and the wallreinforcing rods 54 and 56 couple the column and the wall panelstogether into a strong unitary assembly.

To further assist in keying together column 7 with the wall panels, theopposed edge surfaces 4 and 6 of the wall panels preferably are providedwith stepped contours as seen in FIG. 2. Column 7 interlocks with suchsteps when it is poured in lace.

p To enhance the appearance of the resulting corner structure of thebuilding wall when form 9 is removed from engagement with the outersurface thereof, a pair of generally triangular wooden or like strips 61are positioned in alignment with the intended outer lines of juncturebetween the edge surfaces of the wall panels 1 and 2 and the column 7.Such strips are positioned in place when outer form 9 is located priorto pouring of the concrete in the space between the forms. Followinghardening of column 7, the strips are removed from the wall afterremoval of form 9, thus leaving generally triangular indentations orgrooves running the full extent of the wall and column which are visiblefrom the outer side of the wall. Such grooves produce an appearance ofregularity between the wall panels and the column which might nototherwise exist if the wall panels and the column were directly joinedat the outer surface without utilizing such strips.

To insure the necessary rigidity which permits repeated reuse of theforms 8 and 9 and any interconnectable extensions thereof, it has beenfound that the same should be formed from a sturdy material, such assteel. However, it is contemplated that other materials of lesser weightthen steel which possess sufficient strength, such as aluminum alloys orrigid plastics, may be employed if preferred. Three-sixteenth inch steelplate has been found particularly effective for manufacture of the formstructure illustrated.

To permit similar form members to be operatively and securelyinterconnected in end-to-end abutting relationship, alignment means,generally designated 62, is provided on cooperable upper and lower endsof adjacent form members as best seen in FIG. 4. Such alignment meanscomprise flange structures designated 63 and 64 respectively provided onadjacent ends of the upper and lower form members to be interconnected.

Flange structure 63 comprises an angle bracket welded to the lower endof upper form 13 including an outwardly directed flange 66 whichprojects generally normal to the plane of the wall of the form to whichit is connected. The lower surface of flange 66 is coplanar with thelower edge of form 13. A pair of laterally spaced apertures 67 and 68are provided in flange 66 for the purpose to be described.

Flange 64 is similarly defined by an angle bracket including anoutwardly directed flange which projects generally normal to the planeof the wall of lower form 9 to which it is attached by welding. Theupper surface of flange 69 is coplanar with the upper edge of form 9.

Projecting upwardly from flange 69 in alignment with aperture 67 inupper flange 66 is an alignment pin 71, which preferably has a taperedend to facilitate its insertion into such aperture 67. Dimensionaltolerances between pin 71 an aperture 67 are closely maintained toinsure a snug sliding fit therebetween which insures proper alignment ofthe inner surfaces of the cooperating forms 9 and 13 beinginterconnected. To effect such interconnection, in separable fashion, aconventional bolt 72 is extended through an opening 73 provided inflange 69 adjacent pin 71 which is aligned with the other aperture 68 inflange 66 when the form members are abutted end-to-end. A conventionalnut fastener 74 is threadedly engaged on bolt 72 to hold the alignmentmeans in operative interconnection.

The alignment means 62 on form 9 preferably are provided on each of theside walls 31 and 32 thereof as seen in FIG. 2. However, additionalalignment means may be employed if required at other locations on thefonn structure, depending upon its particular configuration. In thatconnection, it has been found that only a single alignment means of thetype described is needed on the inner form 8, preferably locatecentrally of the base wall 21 thereof.

Similar alignment means 62 maybe utilized on building forms other thancorner form structures. As illustrated in FIG. 7, a wall constructionutilizing a form structure of the type illustrated and described inaforementioned application Ser. No. 662,265 is positioned to form abuilding column 7 between longitudinally aligned wall panels 1 and 2.The inner form 76 is provided with a single alignment means 62intermediate its base wall while outer form 77 is provided with one suchalignment means 62 positioned on each of the opposed tapered side wallsthereof.

Referring now to FIGS. 5 and 6, a modified embodiment for forming acorner column between the adjacent edges 4 and 6 of building wall panels1 and 2 is illustrated. Such form structure is constructed to define acorner column 81 which projects beyond the outer surfaces 12 of thebuilding wall panels. To that end, the outer channel shaped form 82 isdefined by two separable but integrally interconnected form sections 83and 84, each of which is generally V-shaped in cross-section and each ofwhich is defined by a pair of integrally connected side walls 86 and 87.The walls 86 generally form extensions of walls 87 and such walls 86converge relative to each other in an inward direction towards the wallpanels 1 and 2 with which the form structure is engageable. Walls 86 areangularly oriented relative to their associated side walls 87. Each ofthe respective walls 86 include an extension 88 which is engageable withan outer surface 12 of a building wall panel. The wall extensions 88 areangularly related relative to their associated walls 86 and in theembodiment illustrated such extensions extend generally normal to eachother because of the general normal relationship between the wall panels1 and 2 with which such extensions 88 are engaged. Such extensionsterminate in outwardly directed vertically extending flanges 89extending normal thereto.

The respective side walls 86 and 87 and of the respective form sectionsare integrally joined with each other along a ver tically extending edge91. Walls 87 converge outwardly towards each other from edges 91 andterminate in vertically extending outwardly bent .vertically extendingflanges 92 which are positioned in face-to-face engagement with eachother and are held in such engagement by suitable fasteners, such as nutand bolt assemblies 93. It is through such flanges 92 that the formsections 83 and 84 are integrally interconnected into a rigid unitaryform 82 in the manner shown in FIG. 6.

The adjacent side walls 87 of the form structure shown in FIG. 6 areprovided with alignment means 62 of the type described previously sothat similar separable forms may be positioned end-to-end with the formjust described.

Interposed between the respective wall 87 and outwardly directed flange92 of each form section are short wall segments 94 which are alignablewith each other as seen in FIG. 6 to provide a generally planar seat fortapered bolt and nut assemblies 44, 46 and 47 of the type describedpreviously. As will be noted from FIG. 5, flanges 92 are discontinuousat predetermined locations to permit engagement of the tapered bolt andnut assemblies to be engaged with the aligned wall segments 94 at spacedlocations along the length thereof. In that connection, the spacingbetween the discontinuous segments of the vertical flanges in form 82preferably corresponds to the vertical spacing described previously withrespect to the reinforcing ribs 41 secured to form 9 of the priordescribed embodiment.

The separable character of the two form sections which make up the outerform is dictated by the need to separate such sections after cornercolumn 81 has hardened to permit removal of such form from the column.

Because of the substantially greater size of column 81 produced when thetwo piece outer form is utilized, it has been found desirable to provideadditional support for the form. To that end, vertically spacedtriangular brackets 96 are welded in alignment to opposed walls 86 ofthe respective form sections 82 and 83 and tapered nut and boltassemblies of the type described previously are positioned to extendthrough the form between its opposed walls 86. The triangular bracketsprovide generally parallel seats against which the heads of the bolt andthe tightening nut may be engaged.

Fewer of the laterally extending tapered nut and bolt assemblies arerequired and the spacing therebetween may be greater then the spacingbetween the nut and bolt assemblies which interconnect the opposedforms. In that connection, for the longer form, for example one 13 inlength, three such triangular brackets are utilized along the lengththereof, spaced centrally and equidistant from the center in thepreferred embodiment.

The form structure shown in FIG. 6 includes an inner channel shaped form97 defined by a base wall 98 and outwardly diverging extensions 99 and101 integrally connected therewith. Outwardly directed flanges 102 and103 project at right angles to the wall extensions in the same mannerdescribed previously.

In basic construction, inner form 97 corresponds in configuration toinner form 8 described previously in the FIG. 2 embodiment. However,base wall 98 of the present form is of narrower width in accordance withthe ability of the present form structure to produce an internal cornerdefined by a relatively narrow column surface portion which does notproject appreciably into the building comer defined by the building wallpanels 1 and 2. It should be obvious, however, that inner form 97 couldbe replaced in the embodiment shown in FIG. 6 with a form 8 such asshown in FIG. 2, and vice versa, depending upon the internalconfiguration desired for the comer column in a particular construction.

Inner form 97 includes alignment means 62 centrally of its base wall 98for the purpose described previously.

Having thus made a full disclosure of preferred embodiments of thesubject invention, reference is directed to the appended claims for thescope of protection to be afforeded thereto.

Iclaim:

l. Areusable building form structure for use in forming a settablecorner column positioned between and integrally interconnecting a pairof adjacent angularly oriented preformed wall panels during constructionof a tilt-up wall building and the like, said corner column being formedfrom a mass of settable construction material introduced into a spacedefined by said form structure and edge surfaces of said wall panels,said form structure comprising A. a first integral unitary preformedrigid and self-supporting elongated channel shaped form to be positionedin engagement with the outer surface of each of said pair of wall panelsto bridge said space between said edges thereof, and

B. a second integral unitary preformed rigid and self-supportingelongated channel shaped form to be positioned in engagement with theinner surface of said pair of wall panels to bridge said space betweenthe edges thereof,

C. said forms when engaged with said inner and outer surfaces of saidwall panels closing off said space between said wall panel edges for asubstantial portion of their height to receive and maintain therebetweensaid mass of settable construction material therein which is to formsaid corner column of said building between said wall panels,

D. said first form comprising 1. at least two angularly oriented sidewalls integrally connected with each other, and

2. extensions of said side walls which are engageable with said outersurfaces of said wall panels when said first form is positioned betweensaid wall panels to bridge said space between said edges thereof,

3. said side walls converging outwardly relative to each other and beingintegrally connected with each other along an edge portion of said firstform,

E. said second form comprising 1. a base wall, and 2. extensions of saidbase wall which are engageable with said inner surfaces of said wallpanels when said second form is positioned between said wall panels tobridge said space between said edges thereof,

3. said extensions being angularly oriented relative to each other andto said base wall and diverging outwardly relative to said base wall,and

F. means provided on said side walls of said first form and along saidbase wall of said second form for reinforcing each such form and forfacilitating operatively connecting said forms together to receive saidsettable construction material therebetween.

G. said space between said wall panel edges and said forms beinggenerally enclosed thereby to receive said mass of settable constructionmaterial therein which defines said comer column and interconnects saidwall panels into a unitary wall assembly.

2. The form structure of claim 1 in which said extensions of said sidewalls of said first form are generally coplanar continuations of suchside walls.

3. The form structure of claim 1 in which said extensions of said sidewalls of said first form extend at predetermined angles with respect tosuch side walls.

4. The form structure of claim 1 in which said side walls of said firstform join each other directly in an edge.

5. The form structure of claim 4 in which said side walls of said firstform extend generally normal to each other and form generally a rightangle therebetween.

6. The form structure of claim 1 in which said first form furthercomprises 4. two separable form sections operatively connected with eachother along said edge portion at a location spaced from the respectiveextensions of said side walls.

7. The form structure of claim 6 in which each of said form sectionsincludes a. one of said side walls and one of said extensions therein.

8. The form structure of claim 6 in which said separable form sectionsinclude a. outwardly directed flanges in face-to-face contact with eachother, and

b. removable fasteners engaged with said flanges for maintaining saidform sections together.

9. The form structure of claim 22 which further includes F. meansadjacent the top of each of said first and second forms for operativelyinter-connecting each such form with a correspondingly contoured form tobe positioned in end-to-end vertical alignment therewith.

10. The form structure of claim 9 in which said means for operativelyinterconnecting correspondingly contoured forms comprises Y 1. a flangeprojecting generally normal from a wall of one of said forms adjacentthe top end thereof,

a. such flange having at least two apertures therein,

2. a flange projecting generally normal from a corresponding wall of theother of said forms adjacent the bottom end thereof,

a. such flange having an alignment pin projecting therefrom which isreceivable within one of the apertures in said first mentioned flange,and

b. an aperture therethrough adjacent said pin, and

3. removable fastening means receivable through the aperture in saidlast mentioned flange and the other aperture in said mentioned flangefor maintaining said flanges together.

11. The form structure of claim 1 in which said first form is generallyV-shaped in cross-section.

12. The form structure of claim 1 in which said first form is defined bytwo separable form sections operatively connected with each other.

13. The form structure of claim 12 in which each of said form sectionsincludes 1. an outwardly directed flange,

2. the flanges of said respective sections being in face-toface contactwith each other, and

3. removable fasteners engaged with said flanges maintaining saidsections together.

1. A reusable building form structure for use in forming a settablecorner column positioned between and integrally interconnecting a pairof adjacent angularly oriented preformed wall panels during constructionof a tilt-up wall building and the like, said corner column being formedfrom a mass of settable construction material introduced into a spacedefined by said form structure and edge surfaces of said wall panels,said form structure comprising A. a first integral unitary preformedrigid and self-supporting elongated channel shaped form to be positionedin engagement with the outer surface of each of said pair of wall panelsto bridge said space between said edges thereof, and B. a secondintegral unitary preformed rigid and self-supporting elongated channelshaped form to be positioned in engagement with the inner surface ofsaid pair of wall panels to bridge said space between the edges thereof,C. said forms when engaged with said inner and outer surfaces of saidwall panels closing off said space between said wall panel edges for asubstantial portion of their height to receive and maintain therebetweensaid mass of settable construction material therein which is to formsaid corner column of said building between said wall panels, D. saidfirst form comprising
 1. at least two angularly oriented side wallsintegrally connected with each other, and
 2. extensions of said sidewalls which are engageable with said outer surfaces of said wall panelswhen said first form is positioned between said wall panels to bridgesaid space between said edges thereof,
 3. said side walls convergingoutwardly relative to each other and being integrally connected witheach other along an edge portion of said first form, E. said second formcomprising
 1. a base wall, and
 2. extensions of said base wall which areengageable with said inner surfaces of said wall panels when said secondform is positioned between said wall panels to bridge said space betweensaid edges thereof,
 3. said extensions being angularly oriented relativeto each other and to said base wall and diverging outwardly relative tosaid base wall, and F. means provided on said side walls of said firstform and along said base wall of said second form for reinforcing eachsuch form and for facilitating operatively connecting said formstogether to receive said settable construction material therebetween, G.said space between said wall panel edges and said forms being generallyenclosed thereby to receive said mass of settable construction materialtherein which defines said corner column and interconnects said wallpanels into a unitary wall assembly.
 2. extensions of said side wallswhich are engageable with said outer surfaces of said wall panels whensaid first form is positioned between said wall panels to bridge saidspace between said edges thereof,
 2. extensions of said base wall whichare engageable with said inner surfaces of said wall panels when saidsecond form is positioned between said wall panels to bridge said spacebetween said edges thereof,
 2. The form structure of claim 1 in whichsaid extensions of said side walls of said first form are generallycoplanar continuations of such side walls.
 2. a flange projectinggenerally normal from a corresponding wall of the other of said formsadjacent the bottom end thereof, a. such flange having an alignment pinprojecting therefrom which is receivable within one of the apertures insaid first mentioned flange, and b. an aperture therethrough adjacentsaid pin, and
 2. the flanges of said respective sections being inface-to-face contact with each other, and
 3. removable fasteners engagedwith said flanges maintaining said sections together.
 3. removablefastening means receivable through the aperture in said last mentionedflange and the other aperture in said mentioned flange for maintainingsaid flanges together.
 3. The form structure of claim 1 in which saidextensions of said side walls of said first form extend at predeterminedangles with respect to such side walls.
 3. said extensions beingangularly oriented relative to each other and to said base wall anddiverging outwardly relative to said base wall, and F. means provided onsaid side walls of said first form and along said base wall of saidsecond form for reinforcing each such form and for facilitatingoperatively connecting said forms together to receive said settableconstruction material therebetween, G. said space between said wallpanel edges and said forms being generally enclosed thereby to receivesaid mass of settable construction material therein which defines saidcorner column and interconnects said wall panels into a unitary wallassembly.
 3. said side walls converging outwardly relative to each otherand being integrally connected with each other along an edge portion ofsaid first form, E. said second form comprising
 4. The form structure ofclaim 1 in which said side walls of said first form join each otherdirectly in an edge.
 4. two separable form sections operativelyconnected with each other along said edge portion at a location spacedfrom the respective extensions of said side walls.
 5. The form structureof claim 4 in which said side walls of said first form extend generallynormal to each other and form generally a right angle therebetween. 6.The form structure of claim 1 in which said first form further comprises7. The form structure of claim 6 in which each of said form sectionsincludes a. one of said side walls and one of said extensions therein.8. The form structure of claim 6 in which said separable form sectionsinclude a. outwardly directed flanges in face-to-face contact with eachother, and b. removable fasteners engaged with said flanges formaintaining said form sections together.
 9. The form structure of claim22 which further includes F. means adjacent the top of each of saidfirst and second forms for operatively inter-connecting each such formwith a correspondingly contoured form to be positioned in end-to-endvertical alignment therewith.
 10. The form structure of claim 9 in whichsaid means for operatively interconnecting correspondingly contouredforms comprises
 11. The form structure of claim 1 in which said firstform is generally V-shaped in cross-section.
 12. The form structure ofclaim 1 in which said first form is defined by two separable formsections operatively connected with each other.
 13. The form structureof claim 12 in which each of said form sections includes